The logically equivalent proposition of $p \Leftrightarrow q$ is

Write the following statement in the form of "if-then":
"You get a job implies that your credentials are good."

Which of the following sentences are statements? Give reasons for your answer.
"Answer this question."

Which of the following Boolean expressions is a tautology?

The maximum number of compound propositions,out of $p \vee r \vee s$,$p \vee \sim r \vee \sim s$,$p \vee \sim q \vee s$,$\sim p \vee \sim r \vee s$,$\sim p \vee \sim r \vee \sim s$,$\sim p \vee q \vee \sim s$,$q \vee r \vee \sim s$,$q \vee \sim r \vee \sim s$,$\sim p \vee \sim q \vee \sim s$ that can be made simultaneously true by an assignment of the truth values to $p, q, r$ and $s$,is equal to

The converse of "If $3$ is a prime number,then $3$ is odd." is